Power lift



Feb. 27, 1945. A A, SCARLETT TAL 2,370,197

POWER LIFT Filed Dec. 31, 1942 2 Sheets-Sheet 1 je 279i j Feb.27, 1945. A A,sAR. ET1-'EML .2,370,197

POWER LIFT Filed Dec. ('51,y 1942 2 Sheets-Sheet 2 therefore, to increase estantes ses. su ieee rs eine mais este essaies Y Arthur Iii. Scarlett and deliri Higginson, litem,

matarlo, @amada assisnors, itsv mesme assignments, to international' Herv Company, (Chicago, a corporation o2 New ersey Application December 3l, i942, Serial lilo. 47633346 7 Glnims.

This invention relates to a power-lift and more particularly toia power-lift of lthe) type adapted to be used with an agricultural implement, such as a plow.

The invention contemplates and has forY its principal object the provision of an improved power-lift having reduction gearing for the purpose of increasing the efliciency of the lift under certainconditions. Among such conditions is that resulting from the use on plows or other implements of smaller sized wheels because of the use of rubber tires.

mechanism: and to provide improved control .means for the operation of the lift.

' vOther objects Fand ydesirable features. of lthe in vention will become apparent as the disclosure is more fully made in the followedv detailed description and accompanying sheets of drawings, in which:

Figure l is a plan view showings. plow as reprewhich is iournaled in the casing section I?. The l bearings 23 and 24 are shown as being of the N roller type. although it wm be obvious that any j' leise-soa) and the left-hand crank axle I2 carries a lam:-

wheel I5.. The frame includes a pair of plow bottoms IB. which operate in the usualv manner to form furrows and which may be raised and lowered bythe power-lift mechanism, to be described in detail below. y

As shown in Figure .3, the lower end of the crank axle |2 is iianged and secured bybolts y I'I to a lubricant-tight casing or hlousing I8.

The housing comprises right'- and left-hand mating sections I9 and 20 removably secured together' by-a plurality of bolts 2I.

A'transverse driving shaft 22 is iournaled in the casing I8 by means of an antifriction 2l in the casing part 20 and in a second antifric tion bearing 24 carried in a sleeve 25 .that is formed as part of a driven element or crank 26,\

' suitable form of bearing may b'e employed.

sentative of one type oi agricultural implement Y in which the improved power-lift may be embodied.;

Figure 2 is a side View iii-elevation of the im- I proved lift? Figure 3 is an enlarged, sectional view take'n-v substantially on the line 3 3 of Figure 2;

Figure 4 is a sectional view taken on the line Figure 5 is a sectionalview taken on the lie F--i of Figure 3; and

, Figure 6 is a view of the intermittently rotatable lift part. as viewed along the line 5 5 'of Fiomre 3.

The principles of the invention may be embodied in man v forms. and the power-lift unit may he used in several instances. Accordingly. the illustration'of the lift, in conjunction `:vith the plow in Figure l. is to be taken as represen-A tative and not limiting.

As shown in Figure l, the plow comprises generally a main frame structure Iii carried on a pair of crank axles II and i2 and. having a forward draft frame I3. The right-hand cra'nk axle ii has journaled thereon a furrow wheel id,

. member 21.

' oneend to a transverse rock=shaft 39 journaled l The shaft' zz has keyed thereto withinthe nousing I8 a ,driving clutch 'part 2.- This pari'. is

generally cup-shaped` and has an outer iange having its inner periphery provided with a plufrality of notches or engaging portions 28, asnbest' shown in Figure 4. The outer end of the driving shaft 42"' has rigidly secured theretoia driving flange 29, which is rigidly secured to or forms a part of thevland wheel' i5. Y

The shaft 22 hastjournaled thereon interncdiateV its ends and withintlie housing IB anV inter-` mittently rotating member Se. A roller bearing 3! preferably lfr :trms the ioin'naling medium.` The member 30 includes a radial plate portion 3? havingv at one portion of its edge a notch' or engage 4 able portion 33. The face of the plate 32 toward the clutch 'member 2l carries a .transversely extending' stud 36, on which is pivoted a clutch pawl 35 (Figure 4). The pawl carries at its free end a rollerA 36 adapted to be engaged with certain of the notches 2@ ci the clutch member 2l. A tension spring 3l cooperateswlth the stud 3d 'and the pawl 35 to 4urge the pawl 3E toward engagement with one of the' notches/ 28 of. the clutch As best shown in full linesin Figure 4,-the pawl 35 is normally maintained out of engagement with the clutch mem-her, 2 'b y means of a control member 88. This member is keyed at in the casing I8.. The member carries at its other end a roller fm adapted to engage the upper curved surface of the pawl 35. An operating lever il is -keyed to the extending 'end of the rock-shait 39 and is normally positioned so that the rock-shaft eie'cts a downward pressure on the control member 38, which in turn results in downward pressure on the pawl 35 to move the lpawl into disengaged position.

It will be seen from the description thus fai' that during normal plowing operation the shaft 22 is rotated by the land wheel I5. Since the control member 38 is positioned to maintain the disengagement of the pawl 35, the shaft 22 and clutch member 21 rotate freely without any effect on the remainder of the lift mechanism. Actuation of the lever 4| results in upward movement of the control member 38 and consequent upward movement of the pawl 35 so that the roller 36 becomes engaged with one of the notches 28 in the clutch member 21. This results in the driving of the plate 32, on the intermittently rotating member 3l, by the shaft 22 and clutch member 21.

As previously stated, the plate 32 of the mem' ber 30 is provided with the notch 33. When the plow is in normal plowing operation, the plate 32 is held against rotation. The means for accomplishing this consists of the control member 38 and roller 40. As best shown in Figures 3 and 5. the roller 40'is of sufficient transverse width to permit engagement `thereof.with the notch 33 in the plate 32.

'I'he face of the plate 32 away from the clutch member 21 is preferably formed as a bevel gear 42 (Figure 6). The sleeveportion 25 of the crank or driven member 26 is provided adjacent 4its inner end with a pair of diametricaliy extending spindles 443, each of which has journaled thereon a bevel pinion 44 meshing with the bevel gear 42 on the plate 32. The driven element 26 thus provides a carrier for the planet pinions 44. The interior wall of the casing part i9 is Provided with integral teeth forming a second bevel gear 45 meshing with the bevel pinions 44.

'I'he crank or driven member 26 is connected by a link 46 to the plow frame in the usual manner.4 I

The function of the power lift as far as concerns the clutch means 2,1-35 hasbeen described above, with respect to the normal or plowing function of the plow. When it is desired to raise the plow bottom I from the furrows, the lever 4| is actuated to rock the rock-shaft 39 -in a clockwise direction. as viewed in Figure 4 (or a counter-clockwise direction as viewed in Figure 5). `This results in a raising of the control member 38 so that the roller 40 is disengaged from the notch 33 in the plate 32. At the same time,

- the pawl 35 is released for engagement of the roller 35 with a notch 28 in the clutch member 21, and thus the plate 32 and its integral bevel gear 42 are rotated. The driven member 26 is ated to cause another revolution of the plate 32 for the lowering of the bottoms.

It will be seen from the above description. that the improved lift mechanism embodies the principles of the invention to the extent that the foregoing objects are achieved in a desirable manner. Other objects of the invention will undoubtedly suggest themselves to those skilled in the art. It will be understood, of course, that the foregoing description and illustrations are of a preferred embodiment of the invention, and it is not intended thereby to limit the scope of the appended claims.

What is claimed is:

l. A power-lift: comprising a support; a constantly rotating driving shaft journaled in the support; a coaxial driven member journaled in the support; a coaxial bevel gear journaled on the driving shaft; releasable means engageable with said bevel gear for normally holding said gear. against rotation during rotation of said driving shaft, clutch means between said shaft and gear arranged to drivingly engage said shaft and gear upon release of said releasable means; a plurality of bevel pinions rotatably carried by the driven member on axes perpendicular to the axis of the driving shaft and meshing with the aforesaid bevel gear; and a bevel gear coaxial with the driving shaft, meshing with the bevel pinions and non-rotatably carried by the support.

2. A power-lift: comprising a support; a constantly rotating driving shaft journaled in the support; a coaxial driven member journaled in the support; a coaxial bevel drive gear journaled in the support; releasable means engageable with said bevel gear for normally holding said gear against rotation during rotation of said driving shaft. clutchmeans between said shaft and gear arranged to drivingly engage said shaft and gear upon release of said releasable means; a plurality of pinions rotatably carried by the driven member Y and meshing with the aforesaid drive gear; and

for engaging the clutch to drive said plate from then driven at a reduced speed through the .o

medium of the bevel gears 42and 45 and the bevel pinions 44. The intermittently rotating at the same time engages the pawl 35, thus disengagingthe pawl `from the clutch member 21. With the clutch disengaged and the plate-32l locked against rotation, the plow bottoms I5 are held in raised position and may remain in that position until the lift mechanism is again actuthe driving shaft; a bevel gear secured to the plate for rotation therewith; bevel pinions rotatably carried by the driven element and meshing with the bevel gear; and a bevel gear non-rotatably secured to the support and meshing with the bevel pinions.

4. A .power-lift: comprising a support; a constantly rotating driving element journaled in the support; a driven element journaled in the support; an intermittently rotatable drive gear journaled in the support; clutch means between the .driving element and the drive gear; reduction gearing between said drive gear and the driven element and including a gear on the driven element and a gear non-rotatably carried by the support; releasable means4 normally holding the drive gear against rotation; and means for releasing thedrive gear and for actuating the clutch.

5. A power-lift: comprising a housing; a constantly rotating driving element journaled in the housing; a driven element journaled in the hous- 4rotation of said driving shaft, and a bevel gear ing; an intermittently rotatable drive gear journaled in the housing; clutch means between the driving element and the drive gear; reduction gearing contained in the housing and connected between said drive gear and the driven element and including a gear on the driven element and a non-rotatable gear integrally formed on the housing; releasable means normally holdngthe' drive gear against rotation; and means for re'-A leasing the drive gear and for actuating the clutch.

6. Apower-llft: comprising an enclosed hous-` ing; a driving shaft journaled in the housing; a clutch member keyed to the shaft within and at one side of the housing; a driven element journaled on the shaft at the other side of the housing and having a rst portion Within the housing and a second portion outside the housing; a pair of spindles carried by the i'lrst portion of the` driven element and disposed thereon on axes perpendicular to the axis of the driving shaft; bevel Ipinions rotatably carried by the spindles; a bevel gear meshing with the pinions and journaled on Y the shaft between the pinions and the clutch member; neans connectable between the clutch 2g member and the bevel gear; including releasable means engageable with said bevel gear lfor normally holding said gear against rotation during within and integral with the housing and meshing with the bevel pinions.

7. A power-lift: comprising an enclosed housing; a ldriving shaft journaled in the housing; a clutch member keyed to the shaft within and at lone side of the housing; a driven element jourmember and the bevel gear; a bevel gear withink and integral with the housing and meshing with the bevel pinions; releasable means for normally holding the rst bevel gear against rotation and for normally disconnecting the clutch member and said gear; and means for releasing the first bevel gear and for connecting said gear and the clutch member.

- JOHN HIGGINSON. Y ARTHUR A. SCARLETT. 

